Double reversible slate



(Mode l.)

J. 11. MoDADE. DOUBLE REVERSIBLE SLATE.

Patented 0012. 11,1881.

fi w/fl n. m-zna Mum-e Wnhiuglon. 11c.

UNITED STATES PATENT OFFICE.

JAMES D. MGDADE, OF FITTSBURG, PENNSYLVANIA.

I DOUBLE REVERSIBLE SLATE.

SPECIFICATION forming part of Letters Patent No. 248,104, dated October 11, 1881.

Application filed January 12, 1881. (Model.)

'by declare the following tobe a full, clear, and

exact description thereof, reference being had .to the accompanying drawings, in which- Figure 1 indicates a double reversible slate provided with a double-hinged connection,

which also forms a double sheath or carrier for pens, pencils, 850. Fig. 2 indicates alongitudinal sectional view of the same. Fig. 3 indicates a cross-sectional view of the double sheath or hinged connection. Fig. 4 indicates a view of one of the holders and slate-frames. Fig. 5 indicates the shape ofa metallic blank for forming the double sheath or pen and'pencil holder.

Like letters of reference refer to like parts wherever they occur.

. My invention relates to certain new and useful improvements in slates provided with sheaths or pen and pencil holders or carriers; and it consists, first, in a double reversible slate provided with a double-hinged connection, which is so constructed and applied to the frames as to allow the easy reversal of the frames, and also serve as a sheath for the reception and retention of pens, pencils, or other similar articles; secondly, in a double reversible slate provided with a doubler-hinged connection and holder, as described, and having a set ofcords passing around each and connecting both of the frames together in such a manner as to prevent lateral play of the frames and to render the slate noiseless when in use; thirdly, in theconstruction of the sheaths or holders fourthly, in the construction of slate-frames adapted to receive and retain the holders or sheaths; fifthly, in the peculiar form of metallic blanks, hereinafter described, which are especially adapted for the construction of the sheaths or holders and their insertion into the frames.

In the accompanying drawings, A and A indicate the frames of a reversible double slate, and which are provided with longitudinal grooves of sufficient length and depth to re-.

ceive and hold the double-hinged connection or holder B. In forming these grooves 0r slots along the edge of the frames, a pintle should be formed upon or inserted in the frames at each end of each slot or groove, to engage in the ends of the double sheath or holder B, secure it into position, and allow the free movement or reversal of the frames.

' Bindicatesthedouble-hingedconnection and pen or pencil sheath or holder, which is formed from a metallic blank, such as shown in Fig. 5, by curving or bending the same into the shape of an S, and then pressing down its edges to form a double cylinder, excepting at those portions of the strips which are separated at the edges of the blank by the transverse cuts near its ends, which portions are left open a little 'in order that they may be-"sprung over and around the pins orpivots in the ends ot'the slotted portions of the frames when the sheath or holder is to be attached to the slate.

b indicates a sliding wing, which is slightly curved to conform with the interior surface of one of the holders or sheaths, in order that it may be easily slid back to open the sheath and move freely forward to close the orifice of the sheath or holder, as is indicated in Fig. 1, and a similar sliding win g, b,is provided for the other sheath of the double sheath or holder, as indicated in Fig. 3. Each of these sliding wings.

is provided at each of its ends with a spiral spring, 0, as shown in Fig. 4. These spiral springs are attached at one of their ends tothe interior edges of their respective slidingwings b and I), and their other ends are attached to the interior surface of their respective compartments of the double sheath or holder in such a manner as to exert a pressure upon the wings and force them into position to close the double sheath or holder.

D and D indicate small wire catches attached to theinteriorsurface of the middle of the Win gs, and are bent over their forward edges and against their outer surfaces,in order thatwhen the wings are drawn backinto the double sheath or holder the wires may pass over and press with sufiicient force against the exterior surface of the sheaths or holders to retain the wings within their interior.

F and F indicate a set of cords which pass around the upper and lower portions of the slate, and which are attached thereto in such ICO a manneras to form a double connection, which permits the easy reversal of the frames, prevents lateral play, and renders the slate noiseless when in use. These cords are adjusted as follows: A cord is passed around theouter edge of one of the frames, and its ends are inserted through the opposite ends ofan orifice near the outer edge of the frame, and they are drawn through tightly, forming a loop over the edge of the frame. The ends of the cord are then drawn in a similar manner through an orifice near the opposite corner of the frame, and crossed over its inner edge and drawn in the same manner through orifices situated in similar portions of the adjacent frame, and the ends ofthe cord are then knotted or fastened in any suitable manner. The other cord is then adjusted in a similar manner.

By reference to Fig.5 it will be seen that the metallic blank from whichitis proposed to form the double sheath or holder is of a peculiar construction. This blank may bepunched from metallic sheets by the use of suitable dies, or it may be formed from straight strips of the re quired width and length to produce the double sheath or holder by cutting the metal away at both of its edges toproduce the form shown in the drawings. The length of the portions cut away will depend upon thelength of the openings desired in the sheath or holder, and their width will depend upon the width of opening desired. Transverse cuts are then made upon each edge of the strip near its ends, the distance from the ends of the blanks being somewhat greater than the length of the pintles in the slate-frame, which these portions of the blank are to engage when it has been formed and inserted into the slate. WVhen the blanks have been formed the spiral springs are attached to them. They may be closed up and so1dered,except atthe ends, where they should be left open to spring over the pintles of the frames when insertcthand these portions may then be soldered.

Having described my invention,whatI claim, and desire to secure by Letters Patent, is

1. As a new article of manufacture, a double reversible slate provided with a double sheath or pencil and pen holder, inserted within slots formed in the adjacent edges of the frames, and pivoted thereto by means of pintles which project into the ends of the slots and engage in the interior of the sheaths or holders, substantially as herein specified.

2. As a new article of manufacture, a double reversible slate provided with a double sheath or pen and pencil holder, inserted Within slots formed in the adjacent edges of the frames, and pivoted thereto by means of pin tlcs which project from the ends of the slots into and engage in the ends of the sheath or holder, and having a set of cords which pass around the upper and lower portions ofeach frame and connect them together, substantially as and for the purpose herein specified.

3. The combined tubular sheath and re\ ersible hinged connection herein described, provided with automatically-closingwings, which are actuated by means of small spiral springs inclosed within the ends ot'the tubular sheath, substantially as herein specified.

4. As a new article of manufacture, a. |netallic blank having transverse cuts near its ends, which extend from its outer edges toward its center, and cut away upon both sides alongits central portion, substantially as specified, and for the purpose set forth.

JAMES D. MCDADE.

Witnesses:

FRANK M. REESE, GEORGE O. REESE. 

